Hacking at 0300

The question came up about using "European" dates (day/month/year) rather than "American" dates (month/day/year) in flexcal. The biggest problem is that the built-in Date.parse() (which is used by new Date(string)) uses the American format, at least with my browsers and settings.

The code in flexcal that does the formatting are in the following methods:

format({Date})

Converts a Date into a String. Used for external formatting: it determines what string is put in the input element after the user selects a date.

_date2string({Date})

Converts a Date into a String. Used for internal formatting: the rel attribute of each day link in the calendar is set with this.

_createDate(d, oldd)

Attempts to coerce d into a Date. If it is a valid Date, just returns that. Otherwise returns new Date(d). If that does not create a valid Date, returns oldd.

this._createDate(this._date2string(d)) must equal d in order for the calendar to work, and this._createDate(this.format(d)) must equal d for the calendar to be able to parse the string in the input element.

So to use European dates, we have to replace each of those methods. I'll use the "dd.mm.yyyy" format.

<input id="eurodate" value="01.02.2014" /> Should start as February first, not January second.

function euroformat (d){
  return d.getDate()+"."+(d.getMonth()+1)+"."+d.getFullYear();
}
$.widget('bililite.euroflexcal', $.bililite.flexcal, {
  format: euroformat,
  _date2string: euroformat,
  _createDate: function (d, oldd){
    // converts d into a valid date
    oldd = oldd || new Date;
    if (!d) return oldd;
    if (typeof d == 'string' && d.match(/(\d+)\.(\d+)\.(\d+)/)){
      d = RegExp.$2 + '/' + RegExp.$1 + '/' + RegExp.$3; // convert to American style
    }
    if (!(d instanceof Date)) d = new Date(d);
    if (isNaN(d.getTime())) return oldd;
    return d;
  }
});
$('#eurodate').euroflexcal();